Siemens ED43B020 - 20 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Designed for dependable branch-circuit protection in panelboards and load centers, the Siemens ED43B020 is a 20A, 480V, 3-pole bolt-on molded case circuit breaker. Built for environments where vibration can challenge connections, it features a secure bolt-on mounting that delivers a rigid, vibration-resistant bus connection.

With a thermal-magnetic trip unit, it provides stable, repeatable protection against overloads and short circuits, helping to prevent nuisance trips while safeguarding downstream equipment. This breaker is engineered to integrate seamlessly with matching OEM load centers and panelboards, ensuring electrical compatibility and a clean, secure fit.

Key benefits

• Secure bolt-on mounting for a robust bus connection that resists vibration and loosening.
• Thermal-magnetic trip unit delivers precise protection and fast response to fault conditions.
• OEM-compatible ensures reliable operation within Siemens and partner load centers and panelboards.
• 3-pole design suitable for 3-phase 480V systems common in commercial and light-industrial environments.
• 20A, 480V rating supports balanced protection for branch circuits without overspecifying equipment.

Specifications

• Manufacturer: Siemens
• Part Number: ED43B020
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 480V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters

Who is this for? This breaker is ideal for electrical professionals managing 480V, three-phase panels in commercial spaces, industrial facilities, or light manufacturing environments. It’s a practical upgrade or replacement option when you need dependable protection that aligns with Siemens panelboard ecosystems and reduces mismatch risks.

Practical tips: Pair this ED43B020 with compatible Siemens panelboards and load centers for optimal performance. Ensure secure bolt-on mounting and verify that downstream wiring and conductors match a 20A, 480V, 3-pole configuration to protect the intended circuits without unnecessary trips.